Device for removing burrs from sheet metal stampings



June 26, 1934. c E 1,964,174

DEVICE FOR REMOVING BURRS FROM SHEET METAL STAMPING'S Filed Nov. 9. 1931Patented June 26, 1934 UNi'i'ED STATES PATENT ()FFICE DEVICE FORREMOVING BURRS FROM SHEET METAL STAMPIIJGS Application November 9, 1931,Serial No. 573,908

2 Claims.

The object of this invention is to provide a simple, durable andinexpensive means for removing burrs from sheetmetal stampings whereinthe stampings are retained in the form of a ribbon or strip, as thestrip is advanced through suitable supporting guide.

More specifically it is the object of my invention to provide a seriesof steel brushes with means for mounting the same in operative relationwith a moving strip of stampings whereby the brushes may be mounted insuch a manner as to engage all four corners of the strip for removingburrs therefrom, and in connection therewith improved means for mountingthe brushes whereby they may be adjusted both laterally and longitudinally of the strip.

A further object is to provide in connection with a device of the typeabove described improved means for rotating the brushes so that theparticles of material loosened from the strip will be thrown in onegeneral direction.

My invention consists in the construction, arrangement and combinationof the various parts of the device, whereby the objects contemplated areattained, as hereinafter more fully set forth, pointed out in my claims.and illustrated in the accompanying drawing, in which:

Figure 1 is a side elevation of my improved device.

Figure 2 is an end elevation of same with one of the supporting postsbroken away.

Figure 3 is a diagrammatical detail View showing the manner in which thebrushes engage the corners of the strip of stampings.

Figure 4 is a top view of Figure 3.

Referring to the accompanying drawing, I have used the reference numeralto indicate a base on which an upright 11 is mounted, said upright beingdesigned to carry guides 12 and 13 for supporting a strip of stampings14. The inner ends of the guides 12 and 13 are spaced apart a slightdistance to permit the brushes. hereinafter described, to engage thecorners of the strip 14.

A bracket 15 is provided to which a pivoted bar or tongue 16 is secured.Said bar is designed to rest on top of the strip 14 to support the samein a groove 17 in the guide 13, in which the strip 14 travels.

Secured to one end of the support 11 is a pair of horizontally extendingshafts 18, one of which is designed to support uprights 19 and 20, andthe other shaft 18 is designed to support upright members 21 and 22.

The lower end of each of the upright members is slotted and providedwith a set screw 23 whereby the upright members may be adjustedlongitudinally on the shafts 18, and also whereby the free ends of thesaid uprights may be rocked on said shafts. The members 19 and 21 aresupported ahead of the members and 22 in the manner clearly shown inFigure 1.

The upper ends of the upright members are provided with rotativelymounted shafts 24, 25,

26 and 27. The outer end of each of said shafts is provided with apulley 28, while the inner end of each of said shafts is provided with asteel brush 29. Said brushes 29 are locked to their respective shafts bymeans of nuts 30. The brushes carried by the shafts 24 and 25 aremounted ahead of the brushes carried by the shafts 26 and 27 and in sucha manner that their peripheries will engage the corners of the strip 14.

Th support 21 is shorter than the support 19 to permit the brush carriedby the shaft 28 to engage the lower corner of one edge of the strip 14,while the support 19 is longer than the support 21 to permit the brushcarried by the shaft 24 to engage the upper corner of the opposite edgeof said strip. The support 22 is longer than the support 20 to permitthe brush carried by the shaft 2'7 to engage the upper corner of thefirst mentioned edge of said strip, while the brush carried by the shaft26 engages the lower corner of the second mentioned edge of said strip,in the manner clearly illustrated in Figure 3.

By providing one long support and one short support for the front andback set of brushes, means is provided whereby the front set of brusheswill overlap the back set of brushes, as viewed from the front, withoutone brush interfering with the other.

For rotating the brushes, I have provided a stand 31 in which is carrieda bracket 32 for supporting a shaft 33. The stand 31 is also providedwith a motor 34 for driving said shaft. The 95 shaft 33 has a doublepulley 35 for receiving belts 36 and 37. The belt 36 is designed todrive the pulley 18 carried by the shaft 24, while the belt 37 iscrossed and designed to operate the shaft 25, so that the respectivebrushes carried thereby will be rotated in opposite directions.

A double pulley 38 is also provided for the shaft 33, supporting belts39 and 40 by means of which the shafts 26 and 27 are also driven inopposite directions. Thus means is provided whereby all of the brusheswill be simultaneously driven and in such a manner that particles ofmaterial loosened from the strip of stampings will be delivered in onegeneral direction away from the shield 41, which is provided to protectthe operator against particles delivered to the front of the machine.The brushes 29 are designed to operate through the space between theadjacent ends of the guide members 12 and 13 as illustrated in Figure 4.

Thus it will be seen that I have provided a very simple and rigid meanswhereby the burrs and foreign projections of the sheet metal stripcaused by the stamping operation may be easily and quickly removed asthe strip of stampings are passed through the guide members 12 and 13,and whereby the brushes may be mounted in a compact space and in suchmanner that they may be easily and quickly removed or replaced. Means isprovided whereby the oppositely arranged brushes may be adjusted towardand from each other as required for the best working posi tion, and alsoto overcome a decrease in the diameter of the brush, due to wearing awayof the ends of the bristles.

I claim as my invention:

1. In a device for removing burrs from sheet metal strips, thecombination of a guide for supporting a strip of sheared sheet metal tomove longitudinally therethrough, a set of brushes above a strip ofmaterial being fed through said guide, a second set of brushes belowsaid strip,

all of said brushes being mounted on axes parallel to said strip, eachof said brushes being adapted to engage a respective corner of saidstrip, means for rotating both brushes of one set of brushes in onedirection and both brushes of the other set of brushes in the oppositedirection, whereby particles of material removed by all of said brushesfrom said strip will be delivered in one general direction.

2. In a device for removing burrs from sheared sheet metal strips, thecombination of a guide for supporting a strip of sheared sheet metal tomove longitudinally therethrough, a set of brushes above a strip ofmaterial fed through said guide, a second set of brushes below saidstrip, all of said brushes being mounted on axes parallel to said strip,each of said brushes being adapted to engage a respective corner of saidstrip and to have its bristles move laterally and diagonally of saidstrip, and means for rotating both of the brushes 0:" one set of brushesin one direction and both brushes of the other set of brushes in theopposite direction, whereby particles of material removed by all of saidbrushes from said strip will be delivered in one general direction.

ANDREW RAICHE.

